Also still pending for the IOC are doping cases involving U.S. sprinters Crystal Cox and the late Antonio Pettigrew.
Cox admitted in 2010 to using anabolic steroids and accepted a four-year suspension and disqualification of her results from 2001 to 2004.
At stake now is the U.S. women's 4x400-meter relay gold medal from Athens.
Cox ran in the preliminaries for the American team led by Sanya Richards, who ran the final along with Dee Dee Trotter, Monique Henderson and Monique Hennegan. Under international rules, an entire relay team can be disqualified because of the doping of one member, even an alternate.
If the U.S. is stripped of the victory, Russia would move from silver to gold and Jamaica from bronze to silver.
Pettigrew, who died in 2010 from an overdose of sleeping pills, was a member of the U.S. men's 4x400 relay team that won gold at the 2000 Sydney Olympics.
The IOC stripped the U.S. team of the medals in 2008 after Pettigrew's admission of doping but still not reassigned the medals.
Nigeria was second, followed by Jamaica and the Bahamas.
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